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1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
4 | |
5 #ifndef CTR_H | |
6 #define CTR_H 1 | |
7 | |
8 #include "blapii.h" | |
9 | |
10 /* This structure is defined in this header because both ctr.c and gcm.c | |
11 * need it. */ | |
12 struct CTRContextStr { | |
13 freeblCipherFunc cipher; | |
14 void *context; | |
15 unsigned char counter[MAX_BLOCK_SIZE]; | |
16 unsigned char buffer[MAX_BLOCK_SIZE]; | |
17 unsigned long counterBits; | |
18 unsigned int bufPtr; | |
19 }; | |
20 | |
21 typedef struct CTRContextStr CTRContext; | |
22 | |
23 SECStatus CTR_InitContext(CTRContext *ctr, void *context, | |
24 freeblCipherFunc cipher, const unsigned char *param, | |
25 unsigned int blocksize); | |
26 | |
27 /* | |
28 * The context argument is the inner cipher context to use with cipher. The | |
29 * CTRContext does not own context. context needs to remain valid for as long | |
30 * as the CTRContext is valid. | |
31 * | |
32 * The cipher argument is a block cipher in the ECB encrypt mode. | |
33 */ | |
34 CTRContext * CTR_CreateContext(void *context, freeblCipherFunc cipher, | |
35 const unsigned char *param, unsigned int blocksize); | |
36 | |
37 void CTR_DestroyContext(CTRContext *ctr, PRBool freeit); | |
38 | |
39 SECStatus CTR_Update(CTRContext *ctr, unsigned char *outbuf, | |
40 unsigned int *outlen, unsigned int maxout, | |
41 const unsigned char *inbuf, unsigned int inlen, | |
42 unsigned int blocksize); | |
43 | |
44 #endif | |
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